The Collaborative International Dictionary of English v.0.48:

centrarchid \centrarchid\ n.
   any of a group of small carnivorous freshwater percoid fishes
   of North America usually having a laterally compressed body
   and metallic luster: crappies; black bass; bluegills;
   pumpkinseed.

   Syn: sunfish.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

centrarchid
    n 1: small carnivorous freshwater percoid fishes of North
         America usually having a laterally compressed body and
         metallic luster: crappies; black bass; bluegills;
         pumpkinseed [syn: sunfish, centrarchid]